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Essential Chemistry for IGCSE - Making And Identifying Salts (Section 1)

1
How is an insoluble salt typically formed?
Answer
(B)
Reacting two solutions to form a precipitate.
2
What can a flame test NOT tell you about a substance?
Answer
(B)
The type of non-metal present
3
What does the flame test tell you about a compound?
Answer
A
D
4
When testing a gas, why is the test tube held upside down if the gas is lighter than air?
Answer
(B)
To prevent the gas from escaping.
5
Which of the following can be identified using aqueous sodium hydroxide?
Answer
A
B
C
6
Which method of making salts involves reacting a metal with an acid?
Answer
(C)
Direct displacement
7
What is the purpose of filtration after a precipitation reaction?
Answer
(B)
To remove the solid precipitate.
8
When using the flame test, how can you tell the difference between a metal and a non-metal?
Answer
(C)
The metal will produce a specific color flame, while non-metals won't be tested.
9
What gas will reignite a glowing splint?
Answer
(B)
Oxygen
10
What methods can be used to make salts?
Answer
A
B
11
What is the process called when you add one liquid to another drop by drop?
Answer
(B)
Titration
12
How can you safely test for a gas?
Answer
B
C
D
13
What are the main methods to make salts?
Answer
A
B
C
14
What are the necessary steps in a precipitation reaction for salt production?
Answer
A
B
C
15
What are some ways to form a salt?
Answer
A
B
16
What would be a possible observation if chlorine gas is present?
Answer
(D)
It bleaches damp litmus paper.
17
Which of the following is tested with a glowing splint?
Answer
(B)
Oxygen
18
What are the components for the test to identify a cation?
Answer
A
B
19
What information does a flame test provide about a compound?
Answer
A
B
20
What is commonly used to test for the presence of sulfur dioxide gas?
Answer
(B)
Acidified Potassium Manganate(VII)
21
What key aspects are required for the identification of a cation?
Answer
A
B
22
In the context of making salts, what does 'insoluble' mean?
Answer
(A)
Not able to be dissolved in water
23
What is the process for making a soluble salt from an acid and an alkali?
Answer
(B)
Titration, finding the end point, then evaporating the solution.
24
What color is produced by a potassium salt in a flame test?
Answer
(D)
Lilac
25
Which of the following substances is commonly used as an indicator in acid-base titrations?
Answer
(B)
Methyl Orange
26
What is the correct procedure for using a glowing splint to test for a gas?
Answer
(C)
Hold the glowing splint at the mouth of the test tube. If the gas is hydrogen, the splint will pop
27
Which of the following gases is most dense?
Answer
(C)
Chlorine
28
Which of these gases is known for its strong, irritating smell?
Answer
(C)
Sulfur Dioxide
29
What two pieces of equipment are most important to use in a titration?
Answer
(B)
Burette and conical flask
30
What type of compound is likely formed when a metal reacts with an acid?
Answer
(B)
A salt
31
Which technique is used to find the end point of a neutralization reaction?
Answer
(B)
Titration
32
What is a characteristic of a precipitation reaction?
Answer
(B)
The formation of a solid precipitate
33
Which of the following is a method used to identify cations?
Answer
A
C
34
Which reaction type is used to make salts from insoluble bases?
Answer
(B)
Neutralization
35
Which two chemicals can be used to identify a cation?
Answer
A
C
36
What could happen when adding aqueous ammonia to a solution containing Aluminum3+ ions?
Answer
(B)
White precipitate, soluble in excess
37
How can you distinguish between hydrogen and oxygen gas?
Answer
(C)
By adding a burning splint
38
What type of reaction is used to make an insoluble salt?
Answer
(C)
Precipitation
39
What is formed when copper(II) oxide reacts with sulfuric acid?
Answer
(B)
Copper(II) sulfate and water
40
What is a crucial step when making a salt using precipitation?
Answer
(B)
Filtering the mixture to isolate the precipitate.
41
When identifying gases, what does the reaction between Carbon Dioxide and limewater do?
Answer
(A)
The limewater turns milky
42
What is produced when a metal reacts with acid?
Answer
(B)
Hydrogen and a salt
43
What is the state of the reaction between two aqueous solutions?
Answer
(D)
The solutions are in a liquid state.
44
What is the formula for hydrochloric acid?
Answer
(B)
HCl
45
In a precipitation reaction, what are the reactants?
Answer
(A)
Two soluble salts
46
What gas is produced when copper(II) oxide reacts with sulfuric acid?
Answer
(D)
None of the above
47
Which gas will turn limewater milky?
Answer
(C)
Carbon Dioxide
48
Which of these gases is identified with a burning splint?
Answer
(C)
Hydrogen
49
What gas is produced when a metal reacts with an acid?
Answer
(C)
Hydrogen
50
What type of reaction occurs when an acid and an alkali are mixed?
Answer
(A)
Neutralization